Question about 2001 Nissan Sentra

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My car has poor acceleration, and very low power. The engine stutters as if it's running on less than four cylinders. The exhaust is leaking close to the front of the car. I've had the mass airflow sensor changed, the 12V wire on cylinder 1, and the coil on cylinder 1. This is a problem that occurs all the time. To get the car up to 80km/h it's pedal to the floor. I don't know what's wrong.

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Mass Airflow Sensor 2005 Chevy Malibu. 2.2 ltr.4 cyl.

The MAF is in the flex hose that delivers air to the engine, it has a 5 or 6 wire connector going to it.

Posted on Nov 19, 2008

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SOURCE: 95 maxima rough idle

The injector could definitely trigger a misfire code, but you also mentioned that you had a mass airflow sensor code , that code code be responsible for te sluggish moment of the vehicle and rpm going up and down. However if you have a misfire onCyl#6 and the coil and the plug is good the ONLY other thing to cause a mis-fire would be the injector. To check the injector get a NOID light, you can get one at almost any auto-parts place. To use unplug injector plug from the bad injector and connect it to NOID light the light should have a steady PULSE/ligt flickering. If light flickers fine then injector is bad and will need to be replaced. If light doesn't flicker or flickers intermittently then you may have a bad wiring to that injector. Check if wiring is good, then you may have a bad cam sensor or sensor gear. Good Luck and contact if you need more help. Thanks for using FIX YA

Posted on Jan 13, 2009

  • 3 Answers

SOURCE: Sputtering between 1000-2000 rpms

adjust your throttle position sensor

Posted on Feb 17, 2009

  • 79 Answers

SOURCE: 1998 Maxima misfire code cylinder #1

your not getting any fuel into the cylinder

Posted on Mar 22, 2009

NismoMaster
  • 146 Answers

SOURCE: PO300 and PO430 codes for a 2001 nissan sentra GXE

Check fuel pressure it should be 34psi and with vaccum removed from regulator it should be 43psi. Low fuel pressure can contribute to misfires.

Posted on Jul 26, 2009

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1995 Grand Cherokee running poorly- Error Codes 12, 51, 55


As you said I believe you have a problem with the Exhaust manifold between gasket and engine block. I do not know your model but if you have a turbo engine probably the turbo either is leaking or broken.Having these problems,surely the vehicle become very thirsty on fuel and low power. Please do not use your hands to check any exhaust leak,you surely burn seriously your self. Ask your mechanic to do the correct job.

May 28, 2013 | 1995 Jeep Grand Cherokee

1 Answer

Tengo el codigo p0306 saben que es


Hi there:
A misfire is nothing more than a lack of combustion, which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well, such as uncommanded Exhaust Gas Recirculatin (EGR), flow. When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we are left with a P0306 in the computer memory.


Possible Causes:
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
- Faulty spark plugs
- Faulty coil or related wiring
- Ignition module or related wiring issues
- Ignition related sensor faults or wiring issues



Other details could be find HERE.


Hope helps.

Feb 11, 2013 | 1999 Jeep Grand Cherokee

2 Answers

I have a 99 sienna and the cylinders have low pressure what can i do?


If cylinder compression is too low, the car may not even start because of it. Have a shop do a compression test or a leak-down test to check the internal health of your engine. A good engine should have pressures of 150-200 psi in all cylinders and be close to each other. A worn or high mileage engine may have pressure as low as, say 125 psi, but if still balanced (close readings), would still run decent. Compression below that, especially below 100 psi, is serious trouble. ignition spark refuses to ignite the air/fuel mixture and you get a misfire-a non-working cylinder. Low compression can be caused by worn piiston rings or poor valve sealing. Low compression in 1 or 2 cylinders can be a valve problem, burned valves or valves not seating properly.
A leak-down test will check each cylinder and if there is a problem, the test will find the cause of the problem.

Dec 11, 2012 | 1999 Toyota Sienna

1 Answer

Stumbling on acceleration


You may be cruising down the wrong road with the exhaust idea but then you might be right. An exhaust restriction should also cause the engine to run hot. A faulty cat should also set some codes.
If the injectors are dirty, you may have a very lean fuel mix on one or more cylinders under acceleration, which would go away once you are not under load. And injector problems won't set any codes unless an injector stops working completely. Low fuel pressure could cause the same type of issue.

Dec 04, 2012 | Cars & Trucks

2 Answers

Po174


A P0174 lean code for bank 2 is the cylinder bank on the LEFT (driver) side of the engine on Ford vehicles with a transverse-mounted V6 engine and front-wheel drive. This code is not set on four cylinder engines (no bank 2).
WHAT A LEAN CODE MEANS
A lean fuel condition may exist if the engine is sucking in too much air and/or the fuel system is not delivering enough fuel. If bad enough, a lean fuel condition may cause lean misfire, a rough idle, hesitation or stumble when accelerating, and/or poor engine performance . Unmetered air can enter the engine through a vacuum leak, a dirty airflow sensor that is not reading airflow accurately, an EGR valve is not closing and is leaking exhaust into the intake manifold, an EGR valve that is allowing too much flow (because the EGR differential pressure sensor that monitors EGR flow is faulty and is under-reporting EGR flow).
If the problem is not enough fuel, the underling cause may be a weak fuel pump, restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors.

Dec 24, 2010 | Ford Explorer Cars & Trucks

1 Answer

Car suddenly started running poorly, Difficult to start, and bogs badly when gas pedal is pushed. Gradual acceleration up to 2500 to 3000 rpm allows it to go but it does not get better when warmed up. Some...


popping out of the tail pipe is usually a tell tail sign of a timing issue. Pull the timing cover and hand crank the engine. If the marks on the crank and cam line up check vacuum. If needle fluctuates roughly 2in/hg take note(possible burned valves) Inspect the plugs for signs of carbon fouling(fuel injector issue). if the plugs show good burning with a yellowish white check compression. If compression is good check cylinder leak down. if cylinder leak down is less than 30%. check exhaust back pressure.

Dec 16, 2010 | 1995 Mazda 626

1 Answer

Engine lopes whan accelerator is pushed,poor gas


WEAK FUEL PUMP OR STOP UP FUEL FILTER.RESTRICTED EXHAUST LIKE STOPPED UP MUFFLER OR CATALYTIC CONVERTER.LOW ENGINE COMPRESSION.VACUUM LEAKS IN THE INTAKE MANIFOLD.BAD PLUGS.WEAK SPARK OR IGNITION .

Jun 05, 2010 | Ford F-250 Cars & Trucks

1 Answer

Car stutters at stoplights lexus ls400 1990


I had the same issue with my SC400, it was due to low compression in one of the cylinders, due to a leaking head gasket... I was in the process of swapping out the engine for a new 1uzfe, so it wasnt a huge problem, I had been expecting it due to the fact that I had 301,000 miles on it when I finally replaced the engine last week.

Oct 06, 2009 | 1991 Lexus LS 400

3 Answers

99 Toyota Corolla multiple misfire problem


This is what you need to do, change the plug wires, because if there is a bad wire you would definitely experiences sputter or a stutter, so do the plug wires and at the same time do the spark plugs, this should take care of your problem. if not let me know and i will give you the next step

Aug 11, 2009 | 1999 Toyota Corolla

2 Answers

Flatlining at 3000 RPM


maybe the cam timing is off. If the engine was torn down and reassembled wrong, that would do it. Connect a vacuum gauge to the intake manifold and see what you get for vacuum readings.
It should be about 17 inches at idle. And, it should be steady.

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  1. NORMAL READING: Needle between 51-74 kPa (15-22 in-Hg) and holding steady.
  1. NORMAL READING DURING RAPID ACCELERATION AND DECELERATION: When engine is rapidly accelerated (dotted needle), needle will drop to a low (not to zero) reading. When throttle is suddenly released, the needle will snap back up to a higher than normal figure.
  1. NORMAL FOR HIGH-LIFT CAMSHAFT WITH LARGE OVERLAP: Needle will register as low as 51 kPa (15 in-Hg) but will be relatively steady. Some oscillation is normal.
  1. WORN RINGS OR DILUTED OIL: When engine is accelerated (dotted needle), needle drops to 0 kPa (0 in-Hg). Upon deceleration, needle runs slightly above 74 kPa (22 in-Hg).
  1. STICKING VALVES: When the needle (dotted) remains steady at a normal vacuum but occasionally flicks (sharp, fast movement) down and back about 13 kPa (4 in-Hg), one or more valves may be sticking.
  1. BURNED OR WARPED VALVES: A regular, evenly-spaced, downscale flicking of the needle indicates one or more burned or warped valves. Insufficient hydraulic valve tappet clearance will also cause this reaction.
  1. POOR VALVE SEATING: A small but regular downscale flicking can mean one or more valves are not seating.
  1. WORN VALVE GUIDES: When the needle oscillates (swings back and forth) over about a 13 kPa (4 in-Hg) range at idle speed the valve guides could be worn. As engine speed increases, needle will become steady if guides are responsible.
  1. WEAK VALVE SPRINGS: When the needle oscillation becomes more violent as engine rpm is increased, weak valve springs (6513) are indicated. The reading at idle could be relatively steady.
  1. LATE VALVE TIMING: A steady but low reading could be caused by late valve timing.
  1. IGNITION TIMING RETARDING: Retarded ignition timing will produce a steady but somewhat low reading.
  1. INSUFFICIENT SPARK PLUG GAP: When spark plugs (12405) are gapped too close, a regular, small pulsation of the needle can occur.
  1. INTAKE LEAK: A low, steady reading which can be caused by an intake manifold or throttle body gasket leak.
  1. BLOWN HEAD GASKET: A regular drop of fair magnitude can be caused by a blown head gasket (6051) or warped cylinder head-to-cylinder block surface.
  1. RESTRICTED EXHAUST SYSTEM: When the engine is first started and is idled, the reading may be normal but as the engine rpm is increased, the back pressure caused by a clogged muffler, kinked tailpipe or other concerns, will cause the needle to slowly drop to 0 kPa (0 in-Hg). The needle then may slowly rise. Excessive exhaust clogging will cause the needle to drop to a low point even if the engine is only idling.
    When vacuum leaks are indicated, search out and correct the cause. Excess air leaking into the system will upset the fuel mixture and cause concerns such as rough idle, missing on acceleration or burned valves. If the leak exists in an accessory unit such as the power brake booster (2005), the unit will not function correctly. ALWAYS FIX VACUUM LEAKS.

May 25, 2009 | 1994 Ford Mustang

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